Audio mixer



FIG. 1 is a front elevational view of the audio mixer of the present invention;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a top plan view thereof with the bottom plan view being identical. 

The ornamental design for audio mixer, as shown and described. 